Hebrews 12
See to it that no one falls short of the grace of God and that no bitter root grows up to cause trouble and defile many. 16 See that no one is sexually immoral, or is godless like Esau, who for a single meal sold his inheritance rights as the oldest son. 17 Afterward, as you know, when he wanted to inherit this blessing, he was rejected. Even though he sought the blessing with tears, he could not change what he had done.
2 Corinthians 7
Even if I caused you sorrow by my letter, I do not regret it. Though I did regret it—I see that my letter hurt you, but only for a little while—9 yet now I am happy, not because you were made sorry, but because your sorrow led you to repentance. For you became sorrowful as God intended and so were not harmed in any way by us. 10 Godly sorrow brings repentance that leads to salvation and leaves no regret, but worldly sorrow brings death.
judas sorrow for sin was the above, not true repentance
Christ died for him.
20 Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed
for you. Lk 22:20.
6 I have manifested thy name unto the men which thou gavest me out of the world: thine they were, and thou gavest them me; and they have kept thy word. Jn 17:6.
And ALL twelve were given to Christ by the Father:
12 And it came to pass in those days, that he went out into a mountain to pray,
and continued all night in prayer to God. 13 And when it was day, he called unto him his disciples:
and of them he chose twelve, whom also he named apostles; 14 Simon, (whom he also named Peter,) and Andrew his brother, James and John, Philip and Bartholomew, 15 Matthew and Thomas, James the son of Alphaeus, and Simon called Zelotes, 16 And Judas the brother of James,
and Judas Iscariot, which also was the traitor. Lk 6:12–16.
So, yes, Judas was elect, called, chosen, and Christ died for him. Salvation is of the LORD!
Repentace requires recognizing one's sin, confessing one's sin(s), repenting by doing the opposite of one's sin (in this case returning and rejecting the blood money), and obeying God in life for life.
The religious leaders should have obeyed God too and taken Judas outside the city and stoned him for being complicit in the condemnation and eventual death of an innocent man (Jesus).
Judas is with Christ.
Hallelu-JAH for God's merciful and precious gift of redemption!